Rivers Murray and Darling originate from

1. Australian Alps
2. Musgrave Range
3. Mt Roberts
4. MacDonnell Range

Tiny sea creatures that live in the shallow, warm and salty waters of the sea and secrete calcium carbonate.

1. Coral polyps
2. Zooplankton
3. Coral Reef
4. Phytoplanktons

A huge single rock within the MacDonnell range

1. Uluru
2. Monolith
3. Donald
4. Ayanger

Which is not a condition for an Artesian well.

1. Saucer shaped aquifer
2. Porous rocks between non porous rocks
3. Adequate rain
4. Snow-capped mountain